Ballpark Bites for Giants and A’s Games

Do any of the sports arenas in the Bay Area sell decent food, or at least decent enough to ignore the price gouging? A’s fans say they prefer to pack their food (like tacos from El Taco Zamorano for one Oaklander); Giants fans say the SF stadium’s crab roll, once acceptable-to-good, has taken a turn for the worse, and agree that bringing food (like a sandwich from the Sentinel, hold the wet toppings) is your best bet.